Mike Nelson & the Boomerang upgrade

["Jeff Duke (echo17)" <echo177@bellsouth.net>]

hi ya'll, i still need the upgrade kit for my
boomer, I have written Mr. Nelson but I think that
he is possibly still on leave. does anyone have
anymore info? btw, my 'rang has 4megs, and the
proper 1845 ad/da converter. all i need is the
upgrade and a 2134 op amp that needs to be replaced
due to a "pop" when i engage the thru mute function.

peace to all, jeff