According to https://mobile.twitter.com/JustineTunney/status/164190201019... you can probably use the conversion tools from the repo on Alpaca and get the same result.

If you want to run larger Alpaca models on a low VRAM GPU, try FlexGen. I think https://github.com/oobabooga/text-generation-webui/ is one of the easier ways to get that going.