Other than not being 3 feet long, that plug is identical to what the OP asked for.
Possibly not what the OP meant as it does seem a bit odd, but definitely what they asked for.
True but this was presented as an option, that I think is better in some applications.
For the record I own one of these and have made a mental note of the hazard it poses:
I believe it's a Hosa GSK116. Genuine Neutrik speakON and a Switchcraft model 121 1/4" female TS phone connector.
I use it primarily to connect my tube amps to modern speakers. I have a large amp collection, so IMHO an adapter makes sense for me. For someone with just one amp and speaker, the Male 1/4" to speakON cable above would probably be better.
. At the very least I will put the amp in standby and play until it stops passing signal.