I can print them on film with a film recorder up to 11x14, and others can print up to 16x20. But the cost is probably prohibitive, and my guess is you would be well served with inkjet negatives for most alt processes. I don't know of any services that make inkjet negatives. Getting a printer should not cost you $2K, especially if you want to limit your print sizes to 13x19. And by learning to do it yourself you would have complete control of the process.