It seems to me Just Dashes, might take your 1750 dash as a "core" for a restored 2000 dash in return. Maybe I don't completely understand their business. Or wait for someone looking for a 1750 dash who will trade a 2000 dash (the 2000 seems easier to find). Best case would be someone in the US who needs a 1750 dash and would send their old 2000 dash to Just Dashes for you, which you would then have to buy. With shipping and all though the price might get high.
74 Berlina (first car--miss her)
94 164 LS (gone too)
83 Spider (alas, gone)
74 GTV (still have conjugal visits at least)
1987 Milano Verde (now in good hands)