I found this case for $4.95 with free shipping and handling, shipped through Amazon. Video review looks good and I have heard of the brand.
Looks very similar to that two part case that Verizon sells, can't find it on website. Has a silicone rubber piece that goes on phone and then that goes into the hard shell piece.
Acase Superleggera Pro Case for HTC Thunderbolt, more for $5 + free shipping
Acase Superleggera Pro Fit Case for HTC Thunderbolt - YouTube
Looks very similar to that two part case that Verizon sells, can't find it on website. Has a silicone rubber piece that goes on phone and then that goes into the hard shell piece.
Acase Superleggera Pro Case for HTC Thunderbolt, more for $5 + free shipping
Acase Superleggera Pro Fit Case for HTC Thunderbolt - YouTube