For higher-end coolers, I really like Setrab. http://www.setrab.com/
Not the cheapest and shipping from the US. But comes with adapter fittings for whatever connections you want to run.
If you want to save some money (and maybe even time), make up your own lines and fittings. Free speedflow catalog comes with instructions, all you need is an angle grinder, some spanners and a vice, really.
Speedflow is well worth the extra price compared to something like aeroflow.
If you're fitting a sandwich plate + cooler, might as well relocate the oil filter. Not sure what access is like with the RB, but makes life easier changing filters and mounting sensors.