Here's the part number J&P was using a couple of years ago when I ordered the mirrors: Left side, #7600-150, short stem mirror.

The mirror glass area is just under 3 1/2" x 5".

The 3/8" stem makes a 90 degree turn right off the mirror body, has a straight run of 3" makes a 45 that runs straight for 1 3/4".

The ends are 5/16-NF and have appropriate machined collars, washers and a nice chrome plated acorn nut.

Once they're cut you thread them 3/8-NF.

Toughest part in threading round stock is keeping the die straight.
Although with the short run required it shouldn't be too much of a problem.
I do ok here since I have an adjustable collar self guiding die handle.


As far as inside mirrors go, I used a nice billet rectangular one.
Since it was on a roadster with leaned back windshield I had to grind the glue-on mounting shoe at an angle to achieve the proper angle.

If you painted this mirror or the oval one, it wouldn't have the billet look.


Once upon a time I owned a very nice 63 Chevy short bed, big window, half ton.
I got a glue-on mounting shoe off a broken junkyard windshield.
(These things stick on so well that when you take the shoe off you get a mound of glass still attached.)

I believe the "Help" section at the parts house has these shoes available.

After the shoe was on, I stuck a medium size Ford day/night mirror on.
It worked well on the Chevy pickup and was a big improvement over the stock Chevy mirror.

Far as a dash mounted mirror goes, one of P&J's Harley mirrors ought to do it for you.
They have round ones as well as rectangular.

Only thing I don't like about that is you lose the day/night bit, but the standard billet mirror in my 32 roadster isn't really a problem in that area.