I find it rather strange that there have not been any recommendations, fo this so far. There must be someone out there who can provide this service. Fingers crossed.

Hello, Try Googling for a local B&O service centre and make some enquiries. Sounds obvious but it may well be the best way to sound out a few options for yourself. Penta require careful handling so as not to dent the delicate panels - so your primary concern should be with whether the repair shop you choose has experience - and you'll only suss that out with a conversation. I had my Penta Mk2's serviced at B&O Canterbury by their technician, Chris. This was some years ago now and the shop has since closed - Jono and Chris still work in the business though so it may be a good idea to phone and ask. Jono now works for Sound Integration - give him a call and ask if he can recommend someone to service your Penta's. 01227 452 451. Julian

Here is a refurbishment service on eBay: https://www.ebay.co.uk/itm/295320288254?hash=item44c275fbfe:g:isQAAOSwfzJeQIWC I have not used it myself, but you can read the feedback for the specific work you require.

If your crossovers are still working correctly, and all you need is a refoam, you can refoam them yourself.  There are companies both in the US and UK that sell refoaming kits.    I only needed to do the midranges on mine.   Once you get the covers off, the four speakers come out as a unit with their plastic surround by removing a few screws.  Take lots of photos before you remove the wiring so that you can make sure to get it back together correctly.  That or put labels on each wire.  Or both.  :-) Refoaming is a bit of a PIA, but mostly it is just time consuming.  You need to remove all the foam and glue residue from the cone and the frame.  The kit I got had detailed instructions. Since I'm not in the UK, I cannot really recommend someone to do it for you.  I imagine there is a reputable specialist in your area.  It will be far less expensive to ship the speakers without the cabinets, unless you can deliver to a local shop.  Good luck.