kyosho part needed!

[kosh]

i have a kyosho lazer zx-5 and have lost the rear drive shaft coupling. seems the grub screw has worked loose. has any one got this piece on an old car or a new one sitting around unwanted. cant seaily get the part out of stock! in places i have checked. part bagged is the kyosho slipper shaft set k.la203 ant help would be much appreciated. will pay going price.