Help, with gem module

[Crawlinnut]

So here I am the newbie,
So I've searched and read but I can't find the answer
I have a gem module f18b-14b205-dm and it needs replacing
I bought a module on eBay, but of course I got the wrong one its a am instead of dm and has one plug instead of two
Anyways I was wondering if anyone knows we're I can get a used dm module or if I can use another gem module instead that maybe has more options. Any help would be great
My truck is a 200o f350, 7.3, 6sp, pm, pw, pdl, and automatic switch thingy 4x4
Thanks