Kaminomi (World God Only Knows) Cosplay...?

I'm planning on complying as Katsuragi Keima at Otakon 2011, and I already have the clothes, but it just wouldn't be the same without a model PFP (which Keima is rarely seen without) when getting my picture taken. Anybody know where I could find one, or a possible alternative that doesn't involve shelling out 150$ for a white PSP?