PCV valve problem-96 Park Avenue

Is it normal to have oil laying on top of the pcv valve under the map sensor? I replaced the pcv valve and o-rings with new ones when I replaced the plenum about 5,000 miles ago.
Also where can I get a new plastic piece that holds down the pcv valve that also holds the map sensor? I have broken the ears off that hold the map sensor in place. A new one came with the plenum I replaced earlier in the year; I was hoping I could buy a new one someplace:banghead:

To see some oil there is normal. The AC Delco kit below has the plastic retainer.

PN: 89017274 PCV Valve Kit GM List: $25.00

Is it normal to have oil laying on top of the pcv valve under the map sensor? I replaced the pcv valve and o-rings with new ones when I replaced the plenum about 5,000 miles ago.
Also where can I get a new plastic piece that holds down the pcv valve that also holds the map sensor? I have broken the ears off that hold the map sensor in place. A new one came with the plenum I replaced earlier in the year; I was hoping I could buy a new one someplace:banghead:

Do you have the old plenum with the original cap/MAP holderfor the PCV? Or if it was done at a garage, do they have one on an old plenum that would fit for you?

Thanks for the responses-I used the one from the old plenum and broke it also.I will order a new one from gm parts on line.