I don't have all of my research handy, but I am putting this together as a gift as well.
This is the best picture I have on me at the moment.

I will update when I can recall what the actual suitcase was, but it was from the 1950s and is around $1,300 so I just got a 1950s Samsonite in faux alligator for about $40
The knife:
Fairbairn and Sykes British Fighting Knife with the 3rd pattern ringed handle.
https://www.fairbairnsykesfightingknives.com/third-pattern.html
You can find lots of good replicas
The gun:
I just used a toy gun. but the real model was mentioned earlier in this thread.
The Pipe:
I had home depot cut me a piece of 1" diameter by 18" galvanized pipe because I couldn't find that exact size.
The Rope:
I used 20' of 5/8" tan cotton braided rope with a hangman's noose wrapped 12 times.
The Candlestick:
The Diamond Jubilee Candlesticks mentioned else where in this thread. I specifically used the Prince of Diamonds size.
Pipe:
The Billings 12" railroad wrench.
I am still working on the individually sized black 2 part boxes and purple ribbon. And I need to add a brace to hold the suitcase open like it was in the movie.
Good luck to anyone putting this set together its a fun found prop project.
~Tim
This is the best picture I have on me at the moment.

I will update when I can recall what the actual suitcase was, but it was from the 1950s and is around $1,300 so I just got a 1950s Samsonite in faux alligator for about $40
The knife:
Fairbairn and Sykes British Fighting Knife with the 3rd pattern ringed handle.
https://www.fairbairnsykesfightingknives.com/third-pattern.html
You can find lots of good replicas
The gun:
I just used a toy gun. but the real model was mentioned earlier in this thread.
The Pipe:
I had home depot cut me a piece of 1" diameter by 18" galvanized pipe because I couldn't find that exact size.
The Rope:
I used 20' of 5/8" tan cotton braided rope with a hangman's noose wrapped 12 times.
The Candlestick:
The Diamond Jubilee Candlesticks mentioned else where in this thread. I specifically used the Prince of Diamonds size.
Pipe:
The Billings 12" railroad wrench.
I am still working on the individually sized black 2 part boxes and purple ribbon. And I need to add a brace to hold the suitcase open like it was in the movie.
Good luck to anyone putting this set together its a fun found prop project.
~Tim