What tomearm ?

Clearthinker, if you understood this man's situation you would realize how much of a fool you just made out of yourself. People do not crap in their tonearms.

Also, we do not know if the old arm can be reassembled or if parts have to be ordered prolonging thing further. The safest thing to do is buy almost any used 9 " working arm and throw it on there.
Here is one, https://www.ebay.com/itm/154319851659?chn=ps&norover=1&mkevt=1&mkrid=711-117182-37290-0&...

EVEN better a Project arm for $99!!  https://www.ebay.com/itm/Pro-ject-Carbon-Fiber-Turntable-Tonearm-Black-Project/353424393693?hash=ite...

Enlarging a hole is a very easy proposition. Can be done with a carving knife. I seriously doubt the OP cares what it looks like. He would like to be able to play music immediately with a cheap solution. Do you understand what advance lung cancer means?

I screwed up!! The Pro Ject arm spec is 212 mm. So, you would have to move the arm 1 cm away from the spindle. That is not too far and the base may cover the hole. It will work but you will have to enlarge the hole a bit.

@rossb , Excuse me, all 9" Pro-Ject and Rega arms have a spindle to pivot spec of 222 mm. I even think the hole is the same size but I'm not sure of that. 
MCMVMX , look for a used Rega arm. They are around. If you took the Pro Ject arm apart you should be easily able to put a Rega arm on. 
Hang in there,

Mike

Sure, any Rega arm.