I had a racing kart company and replaced a lot of tie rods over the years, it's a critical part and the consequenses of failure even at low speed are significant.
Hopefully you'll get recalled to work soon when things start to open up again. When that happens you want to be in good shape for going back, not laid up from an injury.
Since you don't have a lathe, left hand taps & dies, or raw stock to make tie rods from I can assure you that none of the methods described will cost less than buying the right part. We all love to build stuff here but sometimes it makes more sense to buy what you need.
IMHO, if you can buy the part for $20 you will be dollars ahead over trying to cut and weld what you have now. A good tap or die will plus materials will cost more than that.
John