[Answer]-Payment processing with django

First off, I would say, if you live in the US, check out Stripe (or something similar). The way you are describing your payment process seems a bit overly complicated.

With that said, if (and I doubt this is the case), the HTML returned from the most is in the correct format for display on your website, you can just stick it in to an HttpResponse (must be a sprint)

return HttpResponse(html)

Otherwise, use something like BeautifulSoup, Scrape.py, or something similar to format it IN RAM, and then use HttpResponse. I would not write it to the file system for modification.