Have a BIG headache! I'm A ROokie in Upgrading

[digme]

What I have right now is a Mini Tower MicroATX Case and I've not been able to find a power supply for it....the original went dead and had to change the Pwr supply but can't find one for this small case.....

2) I actually want to change the motherboard and the

 

[ForeverSilky]

Find an ATX power supply, try a local comp. shop. Or... pricewatch