The GTD-350 reminds me a lot of the Allison Model 250 in basic layout and arrangement; I reckon nature gives similar answers to the same question.
Yep. Production of the Mi-2 was transferred to PZL in Poland, and their first attempt at an updated version was the Kania, which actually had Allison 250s. It didn't sell, unfortunately: western buyers didn't trust it and eastern ones didn't want to pay for spare parts in dollars. Lesson learned, they went on to develop the W-3 Sokol with better Russian engines instead.
I rather like the Mi-2/W-3 series. They tend to get overlooked due to their looks and the shadow of the more impressive Mi-8/17, but they're actually decent, useful machines, roughly comparable to an early Huey, and there are still plenty of them about.