RX8 seats into a 1986 military D90

Dear All, as title...I've bought a set of near mint leather RX8 seats to fit into the 90. Was going to add a set of MUD seat raisers but it transpires the raisers don't work with our seats runners as these are the screw type fitting, not the nut/bolt type. Has anyone else come across this before?

My thoughts are to buy a set of later/civilian runners to proper install...or, is there another way that you may have found?

*also posted in Military section*