Any chance you have two caps that sum to make 8.2nF? E.g., you could put 2 caps in parallel such as a 4.7 and 3.3 nF (cap values add when added in parallel), etc. I've often done this - if only one cap's wires can fit in the hole, you can solder them in a kind of 'piggyback' manner - where one cap's legs are soldered in the holes, and the 2nd cap is soldered to the 1st cap's legs.