Checked the engine was unique to the Gamma which makes it even harder to source parts.
Wiki statement about reliability sums it up "Ironically, it was the engines that caused the Gamma to have a poor name. They overheated far too easily, wore its cams, and leaked oil. The wishbone bushes wore out early, and, because the power steering was driven from the left cam-belt, the car was prone to snapping that belt when steering was on full lock — with disastrous results. By the time the FL1 was launched most of these problems had been addressed, but the damage was done, and the car's poor reputation cemented. "
For the truly brave but what a stylish way to be different