I have an XL+ sized Wambac Starless Digger Oversuit (the one they make specially for Starless River) that has inconveniently shrunk so no-longer a comfortable fit for me. Before the comments start it still fits around my waist, it is the back length that is too short. The result is I can't bend over or get out of the suit without help when it is dry.
Has been worn so not pristine and is slightly colour adjusted from ochre which means you won't look like a newbie!
Yours for only £40 or would swap for a part worn Warmbac XXL or XXL+ or other caving gear such as a non-Petzl rack or Hilti TE-6A;D.
Don't look so embarrassed, it's a family trait...