If you're looking for an Elvis Presley jumpsuit or another Elvis costume, consult the professionals. A poorly designed or badly made show costume can and eventually will become a distraction to your audience members. If you are investing in your craft, proper costumes deserve your attention. 
This applies to wigs also. You have two choices when it comes to your pompadour: you can show up for your performance looking like a guy with a dead squirrel on his head, or you can enter the room and make the make the girls swoon with your Elvis-styled coiffure. We think the latter is better.
Here are a few resources on the web we have found for Elvis costumes, Elvis attire and Elvis accessories. The right outfit can potentially bring your Elvis impersonator act to the next level.
Check these out:
Elvis jumpsuits, Elvis capes: (prices start around $1,300) Click Here
Elvis belts: (prices start around $300) Click Here 
Elvis accessories, Elvis sunglassess: (prices start around $30) Click Here
Elvis wigs: (prices start around $15) Click Here