If you can wait Marty does a 914world members only sale about once a year. You just have to watch the classifieds for it.
Really I could make my own headers, even make them out of stainless as I have a TIG, but by the time you buy the box of snakes it's not worth my time.
I know this for a fact because I have used Marty's headers before and I've made several sets of headers for custom apps like T4 into 356 kit cars. I won't even make a custom header for less than $1200.
So me it's false economy to save what? maybe $200?
There's not a single weld on those primary pipes, let's se you do that. Plus the collectors are excellent and Marty's welds are damn near perfect.
BTW I have no dog in this fight I just know what makes a good header.