poly seats to factory brackets

hi i have some poly seats from summit and is there a easy way instead of fabing and welding some new brackets to the factory sliding mounts>? they have 6 bolt holes on the bottom... can i use the mastercraft seat brackets - 59 dollras each! to mount them and maybe drill some new holes? thanks in advance.

Suspension seats mount from the side,just make your own.
http://hometown.aol.com/rpayne9421/page5.html

yeah these are non suspension and have 6 bolt holes on the bottom 3 along each rail might have to make my own