Do any of the vendors sell a coil over setup which already includes shortened strut tubes etc. I have seen plenty of kits. I would like to keep my current tubes intact for future reference.

I'm not aware of any vendors selling shortened tubes. Reason for that is that there are no new tubes being manufactured (haven't for years) and NOS - new old stock - tubes are too expensive for a coilover maker to buy, cut, and weld.