Trouble finding parts

[Vegas Street Rider]

I just ordered a front fork seal kit for my 2009 GZ as the left one started leaking recently. I was able to order all the parts I needed except for the Bush, Guide (#5 in the schematic) which is part #51152C12F00J000. I searched all the sites for parts for both OEM and aftermarket parts and have had no luck. Anyone have any suggestions where I might find them.

I find it odd that that item is available for some of the older GZs but not that year.