Rotisserie kit for Genesis II 4 burner and Searwood 600?

ive been looking online and im starting to go cross eyed.

Does anyone know ow of a rotisserie kit that will fit both a 4 burner Genesis II and a Searwood 600 XL?

I'd also like to have my cake and eat it too by getting this rotisserie for under $100. I'll take suggestions for anything though. This has to exist, right?

please, send me some links or names or something