Well I live in India and so does my friend, and we have "gray markets" over here filled to the brim with gaming consoles, etc, etc. You can get anything from a modded Xbox360 to a modded PSone and a downgraded PSP . They are usually smuggled in from Malaysia or Hong Kong or somethin and you need to be sure about the prices so you can bargain with them. They are total noobs when it comes to technology but they'll first tell you exorbitant prices and you need to show them your "eliteness" and make em realize you know what you want and for what price. You can get some real neat stuff if you quote the price right
As for where you can get a premodded PSone, I have no idea. Wait for other members to reply, and am sure they'll tell you a good and trusted source where you can order one from which is close to where you live