I placed filter orders at both Sporty's and Aircraft Spruce back in March. If memory serves me correctly, both had tentative August ship dates when I ordered.
Yesterday I received this e-mail from Sporty's:
"Regretfully, we have been informed by the manufacturer there are further shipping delays and it might be next year before they can begin shipping. Champion is dealing with massive supply chain issues with no real end in sight.
Because of the uncertainty of the filter delivery, we are cancelling your backorder."
I am OK filter wise right now, and I am hopeful that I don't receive a similar e-mail from Aircraft Spruce. Trying to stay ahead of the situation.
Since gas has nearly doubled in price, I have kept the Bravo bridled back to 24/2200 when I am out flying just for the fun of it. Lower engine temps at that configuration. I think that others do oil, but not filter changes at 25 hours, then change both at 50 hours. Right now my Bravo is in the shop for 4 weeks getting its tanks resealed. When it comes out, if the filter situation has not improved I may resort to the oil but not filter change at 25 hours.