u/KeepInHuman

Hello! I drafted the lens system in the Zemax OpticStudio defining lens radii, thicknesses, etc. Then going to the marketplace to pick suitable lenses. Next, I would like to input their parameters back into the OpticStudio scheme to calculate the distances and spots closer to reality.
But marketplace listings feature only the focal length and diameter usually, not the surfaces' radii and thickness.

How can I model the single lens knowing only the focal length and diameter (and purpose) in OpticStudio? Does the approach above make sense in general?
*Preferably, not optimizing with Merit Function. Because it optimizes for the whole system's focal length, not for the particular lens, as I understand.