Bought an older table saw and now can't find a blade!!!

Hi all. I am new to the sight and need some help!!!

I recently bought an old table saw (Spee-d-cut, made in long beech, CA) and what seemed like a great deal for a nice older saw may have turned into a nightmare!

My problem is that my saw appears to have a 3/4 inch arbor. I measured it with a tape measure and that is what I get, and the current blade says 5/8 inch arbor with a 3/4 inch knockout, which has been knocked out!

In searching tool stores in person and online, I have been unable to find anywhere that has a 10 inch blade with a 3/4 inch arbor!!!

Am I out of luck?

I sure hope not, as it really is a great old saw. Luckily the blade I have now will work, but was hoping to get something that worked better for finish cutting!

Any help would be greatly appreciated.

Thanks
Jef