I don't know of any places, and it sounds like it could be expensive. What sizes do you need? Could you resize your photos on your computer to the sizes you need, and arrange them on 8.5X11 sheets, then have those printed and cut out what you need? Or ask around your friends if they have a good laser printer. You can buy photo-quality paper, and a good printer will look pretty pro-quality.
I have had good luck with Costco photo. Just like Steve recommended. . . have them printed on the standard paper and cut them to the exact size you need. They go all the way up to poster sizes.
size here does matter. I use a local lab for my large 2 to 3 foot size "art" photos. For small stuff Snapfish has some really good rates.
I just saw this, hope someone else can use this tip (which I saw here on Hometalk a few months back). Staples has something called "Engineering" prints that are HUGE (the one I saw was like 30"x40") for under $10, unmounted. I understand that an/the edge(s) might not be as color saturated as the rest, but if that's the case perhaps trimming the outside edge(s) might be a fix. I am going to try one of these prints on a photo I took.
In Canada Staples is the go to place, All different sizes are available. Hope you have the same service where you live .
I get my picture from either Staples or Ofice Depot/Office Max. U just tell them the size, type of paper and email them the image send u r good to go! Some sizes though u may have to take into consideration a little distortion. Try it! Cheap and they do a great job!
Staples does something called "color engineering prints", and unmounted huge (poster size or a bit bigger) prints are under $10.