La Pavoni Safety Valve Steam Release Tube code 3432334 usually replaces the tear apart tubes that usually crack over time.
Part no. 21 on the attached scheme, found right in the pics gallery.
La Pavoni Lever OEM Black Plastic Handle code 371125 is compatible with most LPs, like:
1. La Pavoni Stradivari Lusso STL / STH;
2. Stradivari Professional SPL / SPH;
3. Europiccola EN, EL, ELH and ERG;
4. Professional PN, PL, PLH, PRG / PDH;
5. Romantica GRL;
6. Stradivari Gran Romantica SGR;
7. Gaggia Factory G105 / G106.