Can't hurt to call around.
Back when I put leather teg seats in my 5th gen, I was trying to get the back redone to match. This was back before I found out that 4 door teg seat will work. The lowest bid was $1200 to do just the back seat!!
Now granted this is leather, but that will show you that they can be pretty pricey. You should definitely not be that high though as cloth is a LOT cheaper than leather. I can't find the receipt though to show the break down of labor to materials cost.