I built a MAME panel years ago, used it a few times and after realizing what an ugly franken-panel it was and how much room it took up I tore it apart, here is what is left. Includes USB cable.
Missed this deal by a few minutes, but did some searching and found something almost as good.
Ultimarc has a Value Edition of the I-Pac for $35 shipped.
Difference between regular I-Pac and the VE, is its USB only, and custom codesets are stored in Ram so reset when powdered off.
Not a big deal since I see no reason to use a "custom code". It has standard preset MAME codes already set (and reverts to them when powered off) and since you can just reprogram MAME, you can just set MAME to use the I-Pac VE's code for whatever input you choose.