He's in my 50g until he gets big enough to go in this tank with the big boys!! If I put him in there now; he'd just get eaten, and I wouldn't want that!! 
EDIT: CFC, I have seen some 5" ones in Maidenhead Aquatics Iver for £30 each as well. I have rung just about every LFS I can find in the Yellow Pages, and the only ones I can find are either too small or very expensive!!
You said that they are best kept in groups, would 2 Juraparis and 2 surinamensis get on OK, or would that cause problems?
EDIT: CFC, I have seen some 5" ones in Maidenhead Aquatics Iver for £30 each as well. I have rung just about every LFS I can find in the Yellow Pages, and the only ones I can find are either too small or very expensive!!

You said that they are best kept in groups, would 2 Juraparis and 2 surinamensis get on OK, or would that cause problems?