I also have the combo but havn't really gotten used to the carrier. ... but then I never used one before plus I have other stuff on my belt (leatherman)
I can also confirm the holster is straight black plastic. Its worth mentioning I think that you would probably run into wear issues if it was the same as the phone cover the rubber on the cover is a surface coat and I think if they put it on the holster it would wear off and look ugly.
FYI ... the case drills easily
and the inside is an off white plastic, its not black all the way through.
I conquered my biggest complaint which was that I couldn't soft reset without taking 2 layers off ... so I drilled a hole though both
Drilling plastic is so easy because its soft that unless you go crazy it looks pretty stock.
Also wanted to say ... big ups for seidos screen protector ... works perfect and is clear as they get. If nothing else those are worth the money without a doubt.