hi-
although doepfer does make a very simple version of that, i must say
they are very easy to make. you can buy the jacks from an online
electronics vendor and screw them into a panel to fit your modular or
into, say, an "altoids" or sardine tin. just wire all the jacks
together in the appropriate tip/sleeve manner.

or you can get mono phone jack adaptors which go either way which you
can install/remove from patch leads at your discretion.

these hover around a buck a piece at most online parts vendors.

since these kinds of cable converters/multiples are passive, i always
find it a waste of panel space, and usually just have them floating
nearby the synth.
=================================tom

>
> Looking for a 1/4-1/8 & 1/8-1/4 jack converter.
> MOTM has the MOTM-940 patchpanel, are there any other options
>
> /Boward