I want to replace my natrelle 68hp. What would you suggest for me to gain upper pole fullness? (photos)

Thank you for the question and pictures. Base on your photographs, I think that you will benefit from revision breast surgery. As mentioned in a question you posted earlier, you may benefit from adjustment of the breast implant pockets and/or additional breast lifting to improve your breast symmetry.  
Ultimately, careful measurements (dimensional planning) will be an important part of the preoperative and intraoperative planning process.    Generally speaking, the best online advice I can give to ladies who are considering  revisionary breast augmentation/ lifting surgery ( regarding breast implant size/profile selection) is:
 1. Concentrate on choosing your plastic surgeon carefully.  Concentrate on appropriate training, certification, and the ability of the plastic surgeon to achieve the results you are looking for. Ask to see lots of examples of his/her work.
2. Have a full discussion and communication regarding your   desired goals  with your plastic surgeon. This communication will be critical in determining which operation and/or breast implant size/type/profile will most likely help achieve your goals.
In my practice, the use of photographs of “goal” pictures (and breasts that are too big or too small) is very helpful. I have found that the use of words such as “natural” or "C or D cup" or " upper pole fullness with a good deal of projection” etc  means different things to different people and therefore prove unhelpful.
 Also, as you know, cup size varies depending on who makes the bra; therefore, discussing desired cup  size may also be inaccurate.   
3.  Once you feel you have communicated your goals clearly,  allow your plastic surgeon to use his/her years of experience/judgment to choose the breast implant size/profile that will best meet your goals.  Again, in my practice, this decision is usually made during surgery.  I find that the use of temporary  intraoperative sizers ( with the patient in the upright position)  allows for accurate selection of breast implant size/profile to achieve patient's goals as precisely as possible.
I hope this, and the attached link, helps.

Thank you for your question and pictures.  Based on photos alone you would need some internal pocket tightening (capsulorraphy) and probably some modified lift (especially on the left breast) to achieve your desired look.  An in office consultation is the only true way to answer your question however.  Seek a consultation with a Board Certified Plastic Surgeon who performs a lot of breast surgery to help you.  Best of luck to you