Doepfer is great. They have a revised line of modules meant to be smaller. A dual LFO and a dual ADSR envelope from them would be just fine.

The A-140-2 for the EG ($168) at 8HP and an Eowave Zone BF ($111) at 5HP look pretty tasty to me. That's an EG and an LFO in the same HP as the Batumi and Poti... at less than the price $350.

As far as a noise source, check around. Noise generators are often paired with sample & hold circuits as well as slew limiters. The ADDAC215 will do all of this in 6HP... and gives you TWO S&H circuits plus two slew limiters.