Many of us are probably customers of Surplus Shed Optics:
https://www.surplusshed.com/
John Pecora suggested them a long time ago. At the time, I didn't know about the company. Very helpful, especially for lenses. You can enter the search parameters: lens type, diameter, and focal length (expressed as a range), and the results will appear.
https://www.surplusshed.com/search_lenses.php
Often the cost is $4.50 per lens. I've bought many from them. They also have many other optical components.
Surplus Shed Optics
Forum rules
Finding new homes for holography-related items is encouraged. Even commercial enterprises with goods to offer are welcome as long as it is in the spirit of members helping members. If a for-sale post reads like an infomercial, though, you have probably crossed the line of acceptability.
Finding new homes for holography-related items is encouraged. Even commercial enterprises with goods to offer are welcome as long as it is in the spirit of members helping members. If a for-sale post reads like an infomercial, though, you have probably crossed the line of acceptability.