most of them are generic keys .... should be able to use just about anything.

 

any store that sells parts should have a key that works.

STENS Ignition Key for Craftsman, Huskee Snowblowers, MTD Snowblowers with Zongshen Engines 951-10630, 751-10630 430-386 - The Home Depot

STENS ignition keys provide a great replacement to keep your small engine outdoor power equipment running sharply. We offer ignition keys for a variety of applications. Easy to use and incredible durable.

www.homedepot.com

Toro Ignition Key Kit for Snow Blower 136-8670P - The Home Depot

The replacement keys fit all Toro snowblowers and the black key fits all Toro zero turn mowers. Purchase this key set if you need a replacement or would like to keep an extra key on hand for your snowblower

www.homedepot.com

 

In an emergency, you can probably fabricate one that will work out of a popsicle stick. Or, most any non-conductive item to spread apart the contacts

 

The first thing I do is put a pice of para cord on the key and tie it to the handle. So if it does fall off it will not be lost.

 

cord on the key and tie it to the handle

Yep, I do the same

(edit - pic added)