OT: Harmonica Stomp Question

[SurferJoe46]

Since this is THE place for EFX info - how about an answer to what I need to create a little echo or reverb on my harmonica?

I use a Fender Squier BP-15 amp, and it's very good and plenty-o-power for a harmonica even in a group - but I need some reverb or maybe delay (?) of some sort.

Any ideas? Should not cost as much as my harmonicas though - on an each basis!