If your eyes are good, a decent borelight is probably all you need. Occasionally I've had to ask a shop to run a brush through a rifle, and they usually will without complaint, but would depend on the shop. Maybe a pull through and a few 4x2s in a baggy is worth carrying?
Since you sound like a "practical rifle" shooter, a really well refurbished No4 might be a good place to start; that is one with an excellent bore which someone has restored or "tidied up" for whatever reason.