Just got a Tektronix THS730a, looking for a p5102 alt, also battery door problem

[scottie4442]

I just got a tektronix ths730a, works fine and it came with (2) p6117 probes.  I looked on fleabay for 1 or 2 p5102 probes, I like to work with vacuum tube amps from time to time, and they want upwards of $300 for those things, without all the accessories such as ground clip, etc. Was wondering if there are are any decent alternatives for $200 to $250, I have a couple of stereo tube amps that use 480 to 500 vdc internally.

Also another issue I am having is getting the battery door open, I am afraid to use pliers and breaking the door. Any suggestions.

Thanks