Getting an even stained finish on the long grain and the end grain of pine.

[Not your average framer]

I looking at making some framed mirrors and blackboards for a trade customer friend and want to get a simple, but acceptable finish of the end grain of some narrow shelves on the front of these frames. Unfortunately the end grain of the shelves will be exposed, by cutting the shelves to length. The lengths of pine in question have already naturally discolour to a sort antique pine colour, so I will almost certainly leave these the same colour. I will round off the front corners of the shelves with my bench top disc sander, so the end grain will be visible from both the sides and on a little bit of the front view as well. Getting the the stained bits to match the rest and stay reasonably well match over time is going to be the difficult bit.

Any suggestions welcome,
Thanks,
Mark.