See how kit 3858941 shows that it includes #5 throttle body, #6 orings, #7 injectors, #8 filters,#8 filters, #11 gasket and #14 gasket. Would this be possible to work for you.
The entire throttle body complete is no longer offered by Volvo Penta. I might be able to find you an aftermarket or rebuilt one, but the trouble is that this TBI is only used on the 4.3Gi engines from 1999 and 2000 so they are rare.
If you want me to look for the aftermarket version, I will need all the numbers that are on the tag.
Attached files: Throttle Body Repair Kits.PDF