[RTTY] PSK31 product advice needed

[Glenn and Barbara Kurzenknabe]

A friend of mine has developed a PSK31 related hardware product.  He is not 
real active in the PSK31/RTTY world.  He ask me where he might advertise it 
or who might distribute PSK31 related products.  Being a RTTY only guy, I 
was at a loss for an answer...
Anyone who is active in PSK31 have any suggestions?  Might be best to 
respond off-line.
Thanks and 73
de Glenn, K3SWZ