On my way out of town to California...have not and will not be checking e-mail for awhile myself. I do have some original tops, not perfect, but not broken. I will try and access my e-mail and answer you there. The old resin style acrylic sightglasses are no longer available through me. We've replaced most all with glass, and the ones we haven't (some Erie's, football GB's, Bennett 76 tubes) are being done in a vacuum-formed plastic.
In essence, if we have them in glass then we dropped the acrylic. We had WAY too many complaints on quality, even though they are half-price of glass. Sorry.