You can buy a yellow big half an kilogram zirconium for 90 dollars and calculate your cylinderical lens and order a water jet cut. If you survive from venetian blind effect - less seen at colored zirconia - you have a excellent lens.
There is a company who gave zirconia its name and sell this stuff.
Other option is titania , synthetic rutile piece and order a cut for cylinderical lens.
If you want glass , there are many optical glass sellers at US , imported from China , Japan , Germany and BK7 is damn cheap.