Post how much you are willing to spend since price is SUCH a important factor for you. Not knowing prices is one thing but you can post what you are willing to spend (ie. Looking for some thick dyesubs, not sure how much its worth but willing to drop $60 shipped on these)
If you're looking for thick PBT dyesubs, imsto/KBC dyesub is really the only choice so you can easily see the prices of these all in the classifieds.
Thick doubleshot that would mostly be Cherry OEM doubleshots, so once again price is all over Geek Hack.
Not knowing what something so common is worth when on the first page I'm sure you'll find a bunch that will fit your criteria
But hey, whatever floats your boat