Yes you can get them all the same number. There is a slight upchrge for it but your retailer can do it for you.

If your online retailer can't/won't, then a local shop can. I always get #50 so that it never gets confused with another player's ball.

I order all 4 dozen with the number 2 every year,

Looks like you can get single digit numbers such as '4' but not in two digit form such as '04'.

I did this last year on the ‘4 for 3’ offer and all my Pro V1’s were numbered 68.

Only downside was that I needed to buy another dozen with normal numbering to use when hitting 3 of the tee or a provisional was required...

Why not just mark your ball as per the rules of golf and carry a sharpie in your bag
which almost no one does!

There are actually no rules that state you must put a unique mark on your golf ball. They only refer to the fact that you must be able to determine if a particular ball is actually yours or not.

Personally, I use golf balls with either 00 or 63 as the play numbers. In addition, I also have my name printed on them. This is more than enough of a marking to be able to determine if the ball is mine or not.

I don't believe that REarls meant that the rules say that you MUST put a mark on your ball, but that you are ALLOWED to to put an identifying mark on your ball. Respectfully....

Yes you can order custom numbers.

I order mine with an old jersey number. 65

Can always go to this link and order custom balls: www.titleist.com/custom