modification

Good Day, 

I started doing the upper body series however for the pHS/PE1>iM 5x5r I do not have wall bars. How can I modify these exercises?Thank you in advance

To replace the pike, I like this stretch: https://www.gymnasticbodies.com/best-static-stretch-full-body-benefits/

and here's one variation that works really well for replacing the straddle variations: 

 

 

 

Oh man thank you immensley for response Everett. I am motivated and ready to face the challenge.