You need to build the circuit?
If so
Does it need to be 9V Regulated output or is unregulated ok?
Is the PSU to be current limited or anything else? (or just need to output at least 100mA)
Any other specs?
- Linear PSU or SMPS
- Line Regulation
- Load Regulation
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or else
If your just after an off the shelf unit u should be able to find one quite easily. Just write a sheet with the specs u need and make sure the one you buy matches it.
I'm sure there are plenty of electronics shops that could help you out.
oddbudman