NSN: 5930-00-782-8590
Part #: 8906K1359 or 308-244 or 13205E4785 or 04306-7116 or 69-572
Looked in the great auction site and had no luck. Put the NSN in your search engine and you will find some firms that claim to stock it. You have to check.
When looking for parts, do not limit yourself to "MEP-004A". The MEP-005A is about 90% the same parts, so include MEP-005A in your search. Also, things in the control panel are the same for almost every part, in the MEP-006A also. Maybe you can also put a parts request in the SS forum, someone with a parts gen set.
You may need to spend some time in the -24P, when looking for parts.