You will be OK with veg nutes for first week of flower. I think the nitrogen only needs to be cut by about half. The Lucas formula runs the same the whole grow and it works good. latewoods legacy is much better and ends up the same lucas at the end of flower. I will go look and see how much it drops the N as it goes into flower.

As for finding some thing local. I can't help much there. You need to control the mix.

BRB.