Cant find the lenses but these are the special, custom frames I made for the Sheik Duck, one of the Duckworld talk-show guests (see pix). Carefully cut from 1/8 white, hi-impact styrene plastic sheet that was then painted black. Also a few other things I've come across.
The item "Howard the Duck (1986) Screen-Used Duckworld Original Eye-Glasses Prop" is in sale since Thursday, March 16, 2017. This item is in the category "Entertainment Memorabilia\Movie Memorabilia\Props\Originals". The seller is "s_n_a_r_k" and is located in Jacksonville, Florida. This item can be shipped to United States, to Canada, to United Kingdom, DK, RO, SK, BG, CZ, FI, HU, LV, LT, MT, EE, to Australia, GR, PT, CY, SI, to Japan, to China, SE, KR, ID, to Taiwan, ZA, TH, to Belgium, to France, to Hong Kong, to Ireland, to Netherlands, PL, to Spain, to Italy, to Germany, to Austria, RU, IL, to Mexico, to New Zealand, SG, to Switzerland, NO, SA, UA, AE, QA, KW, BH, HR, MY, BR, CL, CO, CR, DO, PA, TT, GT, SV, HN, JM, AG, AW, BZ, DM, GD, KN, LC, MS, TC, BB, BD, BM, BN, BO, EC, EG, GF, GG, GI, GP, IS, JE, JO, KH, KY, LI, LK, LU, MC, MO, MQ, MV, NI, OM, PE, PK, PY, RE.