OK, you need to revisit all the comments up above.
This is NOT a TK7E, it's a TK7Ea.
That's a different cartridge.
You are actually lucky, because it's a LOT easier to find needles that fit the TK7Ea.
The TK7E needles WON'T FIT.
But there are a LOT more needles that WILL fit.
The TK7Ea body is essentially the same as the Audio Technica AT100E and AT120E and many others. Electrically, they are a little different, but the needles are interchangeable.
Audio Technica is still making needles that fit this body, and they will probably continue for quite awhile.
There are lots of threads about this on VinylEngine. If you do a search in the forums for "AT120 stylus" or "AT120 Needle", you will find lots of posts.
Here is one that gives a pretty comprehensive list of the available needles that are compatible. It might not cover every single one, but pretty much.viewtopic.php?f=19&t=93874&p=789706#p789706
Don't bother with a Jico or other aftermarket stylus for this cartridge. There are enough genuine Audio Technica needles that you should get one of those instead. They are all good, even the cheaper ones.
The best buy, if you can find one, is probably the ATN132EP.
This is almost identical to the original TK7Ea needle.
Do NOT WAIT to buy one of these. They are disappearing fast. The price has doubled in just the last few months and won't ever come back down.
This place MIGHT have one. If they do, buy it. If they don't have the ATN132EP, buy the ATN120E. It's not quite as good, but it is better than anything else you will find at that price.http://stereoneedles.com/audio-technica.html
All the needles in groups K and L will fit, but they are mostly out of stock. They will turn up on ebay from time to time, however.