Tim,
I can sympathize with you. Moreover I may be able to pass along something that may help you. First of all, a sales agent is not where to direct your coverage questions. Always call the ins co home office P D claims. In this case it is apparent the agent misdirected you, assuming the info you provide is correct. I don't want to be the 'insurance guru', but at the risk of same I feel compelled to make answer that may help.
I am unfamiliar with N C Dept of Ins regs - each state DOI regulates its own, however some principles will apply. It may be more difficult to obtain coverage with the carriers your agent represents if multiple crime losses, however not all carriers subscribe to the crime info 'pool'. There is always a way for a savvy agent to enable you to obtain coverage. In addition, the need to obtain a 'floater' in order to cover may not be accurate.
Follow carefully. You mention your buddy and you were in his garage and items were stolen from vehicle in his driveway. This implies he has a freestanding dwelling he either owns or rents. In either case he surely would carry a 'package' policy (homeowners; renters - commonly known as HO-3 or HO-4). You mention "construction tools".
Here are the facts: business personal property has very limited coverage (usually $250) under your own policy. Your vehicle CCD coverage includes only that which pertains to the vehicle. No help there. It is most probable your friend carries a package police introduced in the mid-70s known as the 'HO-76' policy forms. If his home is insured for, let's say $150,000, it is common to use 75% of dwelling amt addl on contents, or $112,500 on contents (coverage 'C'). Of that $112,500 ten percent applies to property of guests or 'invitees'. You were in the garage therefore an 'invitee'. Property was on your friend's premises, therefore the 'property of others' applies with limit of $11,250.
Now the catch - your friend must report and appeal to his own carrier. Really not a problem - loss is not his own, and you as a guest would not use your own coverage anyway, therefore no one is charged - a real win-win. Another caveat - one has a duty to promptly report. Should not be a problem if occurrence in the last year or so since you would not be accused of 'superior knowledge' - it is probable neither you nor your own agent even knows of these stipulations. Secondly, don't worry if no police report - they will simply take your affidavit. Lastly, have your friend make a report to the agent, and then bypass the agent and deal with company (or 'outside') claims only. The agent usually has no authority, and often little or no knowledge. The one caution is "construction tools". If some tools were for personal use you will need to divide this out. The construction tools will be subject to severe depreciation and little or no value, whereas the personal effects will usually be adjusted on 'replacement cost'. You really should have no problem recovering for your loss. B/T/W, there should be no deductible on this 'goodwill' coverage loss.
Richard