I use American Collectors Insurance, Inc. for collision/loss and USAA for liabilty on my 914-6.
www.AmericanCollectorsIns.com Was referred by USAA my carrier. Club membership, garage and limited to 1200 mi/yr (with exceptions for driving to or in non-speed car club events). Also car must be out of production. Costs about $120.00 per year. Never had a claim, so cannot comment on quality of service. Not sure what other packages they might offer.
Oh, and it is stated value policy, meaning I say what it is worth. I get regular PCA valuations to back up my value statement.
You have to watch the fine print, so be careful. Jim is not the only one to recommend Leland-West, so I'd check 'em out.