Product D3035, is a solution of Deoxyribonucleic acid prepared from human placenta at a concentration of 0.05 mg/mL (the 0.1 mg pack size would be 2 mL) and would be the closest equivalent alternative to the discontinued D7011. Please see the link below to review this product:
https://www.sigmaaldrich.com/product/sigma/d3035
If a powdered form is preferred we do offer comparable alternatives such as 11691112001 from Roche, Human Genomic DNA from human blood (buffy coat). It is not from human placenta but prepared from 100 to 200 individual blood donors of both sexes (pool of the buffy coat). If the DNA from another species is compatible in your application, products D1626 (from salmon) or D6898 (from herring) are options to consider.