My word's not gospel, but...
Those platic, or plastic-like, stripper clips might actually be made by Thermold, I believe they'd be of the same material as the Thermold mags. Thermold advertised them as emergency fuel sticks as well, the idea being they culd be burned in a pinch.
They might not be, but others might have enough info. here or somewhere else, if you post a question more directly related to the Thermold stripper clips. I believe that their guide was also, made of the same material, and was not like the GI guide, but was a rectangular "horseshoe" shape, w/ a slotted raer channel that the strippers fit in, and a narrower guide up front, I guess for bullet "tips" to pass through. Post pics if you can, somone here will get you better info.
The safety pin? To be able to attach a guide to every bando? I think that's a goal more than a reality.