I know someone asked where to find some.
There's also a MJ leaf set on there too for that cheech and chong look.


https://www.ebay.com/itm/ROUND-BUBBLE-WINDOWS-PORTHOLE-70S-VINTAGE-FORD-CHEVY-DODGE-STREET-VAN-OLD-NOS/122787057420?hash=item1c96adcf0c:g:WrsAAOSwVlVZ-icI&vxp=mtr