Couple of notes on the design from Mario over at Feser...

It's supplied with a silicon pad to reduce vibration - I'd imagine this is one of their Xvibes.

They supply screws in M3 (for their Xchanger radiators) and M4 which are 65mm long, so if you do want to use 38mm fans I can't see why you couldn't simply source longer screws.

During designing they worked out the minimum distance to reduce the dead spot and then added a small amount on - it's 31mm thick.

It comes supplied with an LED module

Pricing at the moment is 14.9 euros...however, that includes 20% German tax. Meaning they'll retail for about $18 in the US and just under £10 in the UK.