Thanks RedCowboy, EBay was one of my first stops. Unfortunately, those all seem to be 8mm diameter.
Paul, Chinese plastic is just fine. The cheaper the better. Nothing precision here.
I just can't seem to find anything smaller than 8mm.
Would anyone happen to know where I could find some cross colophony lenses that are 5mm in diameter? Preferably US based. The cheaper the better. The plan is for these to go in those super cheap diodes you find for like $0.20 a piece.
I haven't had much luck searching on my own.
Thank you!