Good point. Keep the firewall mount an oem type (there's a better, updated style for that) and the upper engine one can be urethane - I've got a delrin one here but there is noticeable increase in NVH (they do last very well though - so we commonly sell them to our motorsport customers).
For a T-5R, the easiest way to go is the genuine Volvo one. MY94 and MY95 cars are unique in how the ABS module (and bracket) hangs off the passenger side strut tower, so to fit our strut brace, there's a bit to do to modify the ABS module mount.
For MY96 cars, it's easy. Bolt in on and you're done.
For MY97-MY00 (and up to 2005 for C70) cars, you modify the fusebox bracket (we can provide one) and you're done.
Genuine Volvo strut braces are different between LHD and RHD due to the master cylinder and booster location. LHD cars use a fairly straight brace, save for two pressed 'kinks' where it meets the top plate. RHD cars have the 'squiggly' brace, which zig zags its way around the top of the engine bay.
I wonder if the OBX brace will fit the MY94 and MY95 cars. If it does, perhaps your brace, @rado, could make it's way onto @shadycourgette's car and we can get a DVS brace on its way to you. Just a thought.