Added the HP FlexLOM Rev B adapters to the main post. I am selling these
unassembled and at cost.
I have around 15 available.
Shipping is by registered letter for quantities under 7 (roughly 6,50€ with tracking to other EU countries).
The Rev B boards are not compatible with Broadcom based cards like the 530FLR-SFP+ or 533FLR-T out of the box, but it is easy to modify them (you just need to solder one additional wire from a pad to nearby pins A10/A11):
Edit: sold all the unassembled FlexLOM adapters