MS-BASIC for Apple-1 (Replica)

Hi,

I recently got my first Apple-1 Replica (A-ONE) and love it so far. It's the first usable computing device I almost fully understand, great feeling to work with it.

Would love to play around a little bit with MS-BASIC instead of Integer Basic (as I'm severly missing floats), but can't find working (1) sources to it anywhere. If possible I would prefer to build it by myself.

Can anyone help out?

With kind regards,

Egon

[1]: Found some sources for MS-BASIC for a Apple-1 clone here: https://github.com/coopzone-dc/Apple-1-Replica. However, it seems that the source tree is not complete.