First of all; welcome to the addition,lol.
If you have some of those baits you mentioned, you can make your own molds from POP(there are many posts on this subject, just do a search).
As for which plastic is the best; you will get many different answers.(each type has it's good points and bad).
Glitters and colors are pretty much the same pricepoint from place to place. Some companys have different colors than others and some companys need more drops of color than the other; but all have their benefits.
The one thing to remember is that shipping costs will kill you; so try to get most of your porduct in one place.( I get most of mine from Lurecraft because I've been dealing with them for years; first outlet I found; and they are closer to me than the others so shipping is a little cheaper.
If you need any help; let me know.
www.novalures.com