Yes, I did it 2 years ago. 2 holes M8 thread, let the old juice out a couple of months, washed the interior with silicone thinner, refilled with 100.000Cst silicone from ebay. Cca 120g.
Total cost under 30 british pounds.
Time under 4-5 months.
Hint. Use inox caps, copper inbetween.