Product Bundles – CSV import and variable bundles

Hi everyone,
hopefully someone has come across this issue and can offer their experience or suggestions?

I have quite a few product bundles. Lets call them product a,b,c,d etc.
Each of these products(bundls)e is available in 3 sizes – 20,35 and 50 quantity sets.
EG:
Product A size 20 is made up of 4 red, 4 blue, 4 white, 4 black, 4 ties + 1 rope + 1 box
Product A size 35 is made up of 7 red, 7 blue, 7 white, 7 black, 7 ties + 1 rope + 1 box
Product A size 50 is made up of 10 red, 10 blue, 10 white, 10 black 10 ties + 1 rope + 1 box

I would like the Product A to appear as a variable product on the product page with size options of 20, 35 or 50 product bundles as I have for other variable products (that are not product bundles)

I have created the red, blue, white, black, ties and box as simple products.
I created Product A 20 size as a product bundle of these simple products.

Before I go on to create the other product bundles, is there a way for the product bundles to become variable products.

A customer would click on the variable product. the options of 20,35 or 50 size would come up on the product page/
They select 35 size and the product bundle of 35 (7 red, 7 blue, 7 white, 7 black, 7 ties + 1 rope + 1 box) would be added to their cart.

2. is their a way to bulk import product bundles via csv? can’t see how so far with csv plugins.

Thanks for reading.
Your help would be greatly appreciated if you can.
J