SPS3 Autosampler Part missing

Dear community,

we have an SPS3 Autosampler and it seems, a part is missing:

In the "accessory plate" there is a round disc with thread. The sample probe moves through it and is centerd by it.

It seems now, we lost this little thing, as it can be unscrewed from the plate.

Now the sample probe is sometimes hitting the test tubes walls and goes offline.

I was wondering, if this disc could be purchased as spare part, but I can not find it.

If any of you, dear users of SPS3, could take a photo of the part, that would also be very helpful.

Thanx in advance!

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