Thats an awful short push rod for a small block what all has been done to make you need ones that short. I had to order custom lenght (7.125) ones from smith brothers which I highly recommend!!! Mine were $146 shipped to my door in 2 days.
Most off the shelf push rods for adjustables with hyd. Lifters are around 7.389. Your asking for ones 1/2" shorter. I understand if that's what you need, that's what you need. I'm really just curious as to what machine work makes you need ones that short.
Again I recommend smith brothers for custom length.
http://www.pushrods.net