A few more convex lenses are available. I put in only one lin. You can choose each size with the drop down menu on the fasttech page (it's under the price). Use BLF to save 5% more. My link - non aff-link.
Plano convex, 5-90 degree, most of these 98% light transmittance.
43mm ($2,49), 44mm, matte, 96% light transmittance ($2,69), 50mm ($3,50), 50,6mm stripped ($3,13), 53,7mm ($3,46), 63mm ($3,06), 70,8mm ($6,08), 73,5mm ($6,57), 73,8mm ($6,06), 74,2mm ($5,93).
Large biconvex lenses, 98% light transmittance.
102mm, 14,5mm height , without edge ($10,70), 101,9mm, 16mm height , 3,3mm edge ($10,86).