The 5015 is too loud for me so I went with another 4010. I'm using the same 4010s for the hotend and parts fans now - https://www.amazon.com/gp/product/B07L2WTH7H/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

This is to be used with either the original backplate from https://www.thingiverse.com/thing:5436876 or my updated backplate from https://www.thingiverse.com/thing:5875505

I opted to desolder the cable from the 4010 and solder on a new cable with the JST 1.25 already attached. Not sure if you can still only paste one Amazon link here but here's what I used: FTVOGUE 10 Pairs JST Angle Connectors, 1.25mm 2-Pin Electrical Male and Female Connector Plug with Wires Cables
https://www.amazon.com/gp/product/B07N794CZC/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Note the position of the positive pin on the original fan vs the new cable... I had to run black to positive as the connector is swapped on the new cable.

Other than that, I used 4x M2x6mm hex cap head bolts and 4x M2x2mm heat insets. If you don't want to use the heat insets, I'll have a version with smaller holes to fit just the M2 bolts shortly.

I'm also working on an integrated fan grill.