Are your looking for a budget friendly alternative to pot saucers? Think plastic kid's plate! I recently was gifted this Castanospermum australe "Lucky Bean Plant". The cheapest saucers from Home Depot were 80 cents (very thin plastic) to $2.68 (still somewhat thin plastic) so I held off on purchasing a saucer.
Then, I found these sturdy plastic kids' plates for only .59 cents each at Target, available in 2 sizes and 5 colors! They are perfect with the raised edges to be plant saucers.
If you need plant saucers in these 2 sizes, they can work for you a low price of .59 cents.
Reference:
7.3" - https://www.target.com/p/7-3-plastic-kids-plate-pillowfort-153/-/A-54411730?preselect=53195305#lnk=sametab
9.6" plate - https://www.target.com/p/9-6-plastic-kids-dinner-plate-pillowfort-153/-/A-54411737?preselect=53191763#lnk=sametab