Australia's most wanted. The holy grail?

There's been a few posts recently about parts that are difficult to source and it gave me an idea.
 
We all probably have lists of various parts we need, but what's the one thing you've not been able to find, the one holy grail of unobtainium  that you always wish for is listed as "'buy it now" on ebay but never is?
Maybe it's available, but you'd prefer to send your kid to uni.
Maybe if we know the one item, like a 3000 V6 badge someones might be chasing for instance, they might be spotted up at a local garage sale or swap meet.
 
So for a bit of fun, rules are one item only to start with, and perhaps post a price you'd go to if you think it'd help.
This is going to be mine for a fair while I think, possibly not as hard to find as some other parts, but haven't seen an affordable good one, RS2000 wheel:

 

I've got a bit of a thing for original radios. Got an AM/FM for the RS but the parts manual says there was a tape player. So far I haven't found one. Still looking for one for the Cortina, heading to a country auto jumble this weekend, will pin a wanted note to the back of my shirt too... if you don't ask you don't get...
Cheers Drew

I'm committed Deano but not that committed however... 'adapt and overcome' a workmate is from Ballarat, his old boy attends so I've sent him off a pic of the Cortina radio and he'll keep an eye out, cheers for the heads up.
I did actually find one today in an aladdins cave of Cortina parts. The guy had only found that one in 30 odd years of collecting parts so it wasn't for sale, fair enough, I asked if I could at least touch it haha...
Cheers Drew

I've always wanted good Capri front grills. I bought two but they never arrived. Missed out on a few through time or internet connections. I finally found one it was new old stock in a ford bag from Germany. $250 delivered. So happy then opened it and three of the strips have been bent in transport and the seller wrapped the grill with so much care. Ply wood back with cotton on the edges and lots of cardboard wrapped around with special cardboard bungs in the end. My pics won't work to post but now I need a good way to straighten them.

I have never been able to find those littel round bits that sit between the wiper spindle and the wiper arm.  When I was in desperate need I would have given and arm and a leg!!
 
 

When you figure out how to refurbish it then let me know, as I have one I'd like to use that has no rubber on it at all!

The locking tabs for the bolts that hold the D-Clamps on the front sway-bar bushes.

They are available completely restored as per OEM.
www.peterlytton.com