Pretty much anywhere. Just Jap do them http://justjap.com/store/product.php?produ...=299&page=1
I used one on my old ITR. So if you get one, make sure you test fit it to make sure the senders clear everything etc. I cant rememebr what the bit on the RB block looks like, it might be fine any way. But the ITR the pressure sender had to sit in an exact place to clear castings etc, as they are bulky.
Also as i found, the blanking off bolts are tapered, and once they are in, they strip the sandwich plate out if you try remove them
So hand tight only my friend! Then crank it in once you know its all good and fitting snug.
Oh, and thread tape on the senders. Mine leaked a bit without it.