You can purchase official editions from Sharada Granthalaya or Exotic India Art .
संस्कृतभाषादीपिका प्रवेश: Samskrita Bhasha Deepika samskrita bhasha deepikai pdf 2021
The was particularly significant because it included updated typography, corrected errata from previous decades, and sometimes supplementary answer keys that were missing in older reprints. You can purchase official editions from Sharada Granthalaya
संस्कृतभाषादीपिका- Sanskrit Bhasha Dipika (Set of 2 Volumes) | Exotic India Art corrected errata from previous decades