Here's a new Clutch Master Cylinder Assembly (3/4") (0.75") for the following models from Reliant - 

RELIANT

Reliant Scimitar 3.0 (SE5a & SE6)    (1972- 76)

(That means Ch. 452501- 453410)

(** Not for the earlier Scimitar SE4 (Early) of 1965-Feb 69 which used a 0.75 Girling Clutch Master **)

(** Not for the earlier Scimitar SE4 (Late) of Feb 69-72 & SE5 which used a 0.875 Girling Clutch Master **) 

(** Suits the Scimitar SE5a & SE6 of 1972-76 which used a 0.75” Girling Clutch Master **)

(** Not for the later SE6A & SE6B 1976- 86 which used a 0.625” Lockheed Clutch Master **)

Yes you CAN buy a cheaper Master Cylinder for £28 which has the Wrong Pipe Thread  - Then spend the rest of the day trying to find an Adaptor..... 

OR 

You can buy this, fit it and drive off within half an hour - You decide.......

Rod can be removed and swapped if required.

Here's a new Axle Set of Front Brake Caliper Repair Seals Kits (x2) for the following models from Reliant-

RELIANT

Reliant Scimitar SE4  (**1964- Aug 66 Only**)

(** Only for this early model which had a 2.6 Litre Straight Six engine **)

(Not for the earlier Reliant Sabres of 1961- 64)

(Not for later Scimitars which had x3 pot calipers)

Here's a Front Wheel Bearing Kit (x1) for the following models from Reliant -

RELIANT

Reliant Scimitar GTC  (2.8)                             (1976- 86)

Reliant Scimitar GTE  (2.8, 3.0 SE6, SE8)  (1976- 86)

Only for these years.