First Class Mail only costs around $3. Priority Mail costs more because the USPS charges me more to send packages that way.
You want EPDM rubber, which you're not going to find at your local parts store. It's fully compatible with automobile brake fluid.
FWIW I'm the guy...
The guidelines I read here don't require a picture, but sure, no problem.
I recently worked with Ed Meyer to produce the most accurate reproduction of the rubber shield used between the front bumper and stone deflector on...
New 1969 with tach instrument cluster red lens for "BRAKE SYSTEM", "OIL", and "ALT" warning lamps, $10.
New power steering return hose clamp, NPD...
I'd really like to see someone reproduce the 1969/1970 console base.
The 428 SCJ used the same hydraulic lifters used in the 428 CJ. You can read more about the 428 CJ and SCJ here: