I don't have the space for a lathe so I buy the blanks on LPO. The largest they carry is 6" ($4) and 8" ($5). If you search around you can find them cheaper. I've found a 6" cigar style for as low as $2.
All prices TYD
3X - $35
Ct rat - $65
Trap Duck $65 as near perfect as you can get
Bullshooter 160 $65 - purchased with no lip weight
Mattgills as a set $25