Pretty much any bike shop or online seller will have rings in that size.
It’s worth playing with a gear calculator before you buy new chainrings. Many folks find they don’t really use the top few gears with a 52t ring. Sizing down to a 48 or so may get you a more useable full range, unless you are a beast or have enviable descents.

The 130mm BCD rings on arabesque cranks look like just about any silver rings of that very common size these days, except they didn’t have the shift assist shapes on the back side. That said, I find the smaller holes of many Sugino outer rings don’t look as good.

Compatibility with your cassette is no problem, despite what some manufacturers might say about “speeds”.

If there’s a nearby bike co-op or seller of used components, you can save money by looking there.

For new rings, Harris Cyclery has TA rings, which are lovely and long-lasting, but pricey:

https://www.harriscyclery.net/produc...05/?rb_ct=1278

Here’s a source of many brands in that size:

https://www.universalcycles.com/shop...?category=2629

Congratulations on the Miyata 912. I’m still loving my ‘79 bought new, now in its fourth major configuration. I’ve put almost 100 miles on it in the last week.