Here is a unique 'Silly String Silver 11" Shooter and Refill' - Bhs New Old Stock - I can see no more of this design available for sale anywhere.

Contains 1 silly string shooter & 1 can of silly string (see below). Pull the trigger to spray the silly string! Works with all standard sized silly string cans.

Produced by Bhs Limited, London, England. Made in China. Item No: 036/00362434/1924, Barcode: 5 044335252081, SKU: 21529127, Silly String Barcode: 5 044335252104. 
CE marked. Do not shoot directly onto vinyl or leather, silly string will stick. Keep away from reach of young children. This product must not be consumed. Read instructions on silly string can before use.
Not suitable for children under 3 years - potential choking hazard. (NB: Cannot guarantee the condition of the silly string in the can due to age - it may or may not still be viable. Other refills can be obtained / used).

The approximate Shooter sizes are:- Width 10.65" (27cm) x Height 5" (12.7cm) x Depth 2" (5.2cm).
The approximate Silly String sizes are:- Width 1.85" (4.7cm) x Height 6.2" (15.8cm) x Depth 2" (5.2cm).
The approximate Original Packaging (complete) sizes are:- Width 12.4" (31.5cm) x Height 11.5" (29.2cm) x Depth 2.2" (5.5cm).

Sorry I cannot offer combined postage as all items are unique & packed prior to listing.