[Barnsnake]

You can make your own quite easily.
Use a piece of stiff wire or fabricate it from sheet metal. Attach it to a bolt near the crank damper in a location that is easy to hit with a timing light.

Insert a piston stop in #1 cylinder. Gently rotate the crankshaft clockwise until it stops. Make a mark on the damper at your pointer.

Rotate the crankshaft counter-clockwise until it stops. Put another mark at that location on the damper.

Measure half way between the two marks and make another mark. This is top-dead-center.

Order the appropriate timing tape from Summit (or whoever) and apply it to the damper with its TDC mark exactly on your measured mark.

You now have a timing pointer that is easy to see and is perfectly accurate (unlike those tin things spot-welded on SBC timing covers).