The par metal custom sizes are a standard minimum fee of 121.00. If you're handy with cutting/shearing metal, get the 12 series 3 RU 12in deep and just cut it to the size you want it. I did that and it worked out great. Also, the 12 series differs from the 14 series in having a double front panel which is handy for using rotary switches that have the stress tabs that require an extra small hole - i.e you won't have to have it sticking through the front panel. Just make sure you get pots with full 3/8 bushing length for the extra clearance space. The cost for the 12 series -1219125A is 81.00.