Most guys will do a small amount like you need but they charge a lot (relatively) to do it. Usually if you can find a need for 100'+ the cost will go down enough that you'll almost get that extra 50' for free. You shouldn't pay more than about $3 a foot right now for sod removal, color, stamp, second color (antiquing), and sealing. IMO, not worth the hassle of doing it yourself. Look in the junk advertisements you get in the mail, there is always a couple advertising a deal in them.