Hi
You can sort out ur problem in two ways.
1) Create a QM Material Authorization and assign it for all SPARE material type and then in QA32 in dynamic selection you can filter out on the basis of QM Material Authorization
2) Go to MM60 to take out the list of all spare material type and assign all those materials in Material filed and make a variant of it. then ask store person to select only that variant of doing result recording.
Regards
Manish