I'm afraid I don't know of anything available currently, but there used to be. My late machinist made me up a small quantity of the bases (around a couple of dozen IIRC) & just three sets of the rings. This was many years ago, & I'm afraid they all sold long ago. I had the bases made when there was a small batch of original TP scopes & rings available for sale on the market via the late Pete Bloom. He picked them up in Belgium, & I gather they had been salvaged when either Belgian or Dutch (I think it was the latter) TP rifles were being destroyed. I think someone else has also marketed bases more recently, but I cannot recall who it was. Maybe someone else may be able to help here....
PS.......I don't have drawings I'm sorry to say.