This may help others.
Through my own negligence I pushed my Ithaca XL300 20 gauge off the table it was laying across. Stock hits concrete floor and thankfully most of the rest of it on a padded rubber mat. But damage was done.
Although not an expensive firearm I have had it for quite a number of years and it is a great shooter with no issues.
I started looking for a stock with no luck. Everything I was finding was for a 12/16 gauge. Pressed on further and ultimately called Ithaca SKB (Rob), as the website shows parts for everything but the stocks. Bingo. Winner. Not usually my luck but ultimately end up with the choice of three correct stocks in various shades of stain/color.