Spotted these on EBAY:

For a 7 speed cassette.

Shimano HF05 48 hole rear hub is laced to a durable Sun CR18 rim using stainless steel DT Swiss 2.0 straight gauge spokes with brass nipples.

They are spaced at 140mm but they can re-space and re-dish them to 135 fro an extra $40.
Got one from them and they did a really good job tensioned and stress relieved well. Just ordered my 2nd wheel after they offered free shipping.
Two more left. Just thought I'd throw this out there to you after looking long and hard for higher spoke count wheels myself.