the bit that is in your new board is a chinook two bolt base and they are very good IMO,
they are about $25 dollars last time i bought one,
Buy another one and stick it in you other board, then buy a chinook uni to fit.
IF you wanna go all out , then buy a a chinook tendon uni. i think its called a powerhaul EX or something, they are about $100 and fit into those bases , of course they are a euro pin which means u will have to buy another extension or and adaptor.
Powerhaul EX
IS THE BEST euro pin uni u can get because it is made of solid stainless and is allot less likely to snap then the boge type that have a pin screwed onto a bolt hanging out of the rubber.