I think youd feel better just letting out a good yell....I'm guessing they "welded" that because the tracks were too big and couldn't get the adjustment needed with the bolts. The "good news" is all the bolts are just standard course thread grade 8, you should be able to grab em from a hardware store.
The tracks may be off of something else they own and just wanted to send em down the road with the machine. You could keep an eye on CL for a used set but that may take a while. If you do need to buy new tracks make sure you buy em from a reputable manufacturer, there's a lot of garbage out there for those style tracks, get the wrong ones and they'll stretch then tear real easy and you'll be right back where you are now.
I followed your other thread about the Case, you seem like a persistent person, you'll get this thing figured out , just be patient....