[TR] TR4 bypass hose question

[Jim Henningsen]

I would like to install a regular (non bellows) 160 degree thermostat in my
62 TR4.  I am hearing that to do so I need to block off the bypass hose.
I'd like to keep the stock look of the bypass hose installed.  Is there a
particular plug or bung that folks have used to insert into the bypass
opening on the water pump housing or thermostat housing that is effective.  
Thanks in advance.
Jim Henningsen
Ocala, FL 34471