What if you stopped talking to him?
If the past points to the present and future...he will keep lying and he will search for one you can buy, why the aggravation and temptation to buy it? It may be prettily wrapped but the package is unchanged....and I think it is a can of worms.
You deserve to relate yourself with trustworthy people.
He has proven he is not that.
I know it is not what you want to have and you don't like it that he is so glib with fabricating stories but I don't think anything you say or do is going to change that one little bit...at most he will be more careful with his stories and get better at it.?