I went for the Nooelec Nano 2+'s
For what I gathered from NooElec's website they are the same as the 3's just in a plastic housing. I took the housing off and they fit perfectly.
https://www.amazon.com/gp/product/B01K5KAN60/ref=ppx_yo_dt_b_asin_title_o05_s00?ie=UTF8&psc=1
On the Stratux slack chat they said they are having production problems due to Coronavirus and factories being shut down during the Chinese New Year. Also said it would probably be end of March before they have them in stock again.
I used the Nooelec Nano 2+'s on one I built a few weeks ago and they work great.
https://www.amazon.com/gp/product/B01K5KAN60/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1