I have several types of bridge heads, however, I personally, have never heard of a "SPINALI" bridge head. Can you describe? I might have one, and not even know it! lol.
Check eBay religiously. I found and bought 4 from a seller a couple of years ago. Gave one away, traded one, someone stole one, and I have my last one, still in the original package....but I'm keeping it. The plastic used on the Spinali was a much better grade, and the head itself a bit thicker. I had one of the knock-off ones and it snapped in two.